Choose in Settings > Appearance, or the list's ⋯ menu > Mailbox display (a
popover with three preview cards; picking one applies it and closes it).
Stored per device, like the theme; phones keep their own single panel.
- Side: the existing three columns.
- Bottom: the list above, the reading pane below, 45/55 until the 3px divider
is dragged (height remembered). The pane's top bar takes the list filter
bar's colour; the empty-pane picture shrinks to fit.
- Off: one panel. The list, until a conversation opens in its place with a
Back button; bulk actions move to a bar above the list. This reuses the
phone's list/pane switching with desktop styling.
- In Bottom and Off the side-panel toggle sits beside the search box (Off also
keeps it in the conversation toolbar, since the list is hidden there).
- An expanded composer covers the reading pane in every arrangement: the lower
pane under the list, the whole panel with the pane off.
Resizer gains a horizontal orientation; layoutDock takes the pane height.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
lukasandClaude Opus 5.5
b1bdae6e59